Welcome to FDLOSG.com

OSG, Outlying Sewer Group, is a group of representatives from Townships and Sanitary Districts whose wastewater is treated by a regional wastewater treatment plant located in and operated by the City of Fond du Lac, Wisconsin. The OSG includes 13 Sanitary Districts, 5 Townships, and 1 Village, all of which are adjacent to or near the City of Fond du Lac.


The mission of OSG is to share resources, consolidate purchasing and contracting for competitive pricing, and work cooperatively with the City of Fond du Lac in providing a high level of service and reliability to our customers.